UE Relay Connection Setup With Preconfigured Network Authorization
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Solution Overview
Problem
Existing communication systems lack an efficient method for establishing L2 UE-to-NW relay connections, particularly in scenarios without network infrastructure, such as tunnels or emergency situations, which are critical for National Security Public Safety (NSPS) communications requiring high reliability and enhanced coverage.
Innovation Solution
A method for relay connection establishment between UEs involves determining UE authorization, PLMN subscription, RRC state, and AS configurations, with network node involvement to configure UEs for relay services, including adaptation layer and logical channel configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relay connection establishment methods are implemented in existing communication systems, then coverage and reliability are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent applies preliminary action by having the network node pre-configure the second UE with relay service capabilities and AS configurations before relay connection establishment is needed. The second UE is pre-authenticated and pre-configured with adaptation layer parameters, logical channel configurations, and other necessary settings, so that when relay connection establishment is triggered, the process can proceed efficiently without complex real-time negotiations.
2Reliability
If comprehensive UE authorization and configuration checks are performed, then relay service reliability is improved, but signaling overhead and establishment time increase
Solution Approach 1:
The patent performs authorization checks, PLMN subscription verification, and AS configuration validations in advance during normal network operations. The network node maintains ready-to-use configuration data for the second UE, including adaptation layer parameters and logical channel settings, so that when relay connection establishment is needed, these pre-validated elements can be quickly activated without time-consuming re-verification.
3Adaptability or versatility
If detailed AS configurations and adaptation layer settings are provided, then relay service quality is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent implements self-service by having the second UE store and autonomously apply pre-configured AS configurations and adaptation layer parameters when entering relay mode. The UE can independently activate these pre-configured settings without requiring continuous network interaction or real-time configuration updates, thereby reducing power consumption while maintaining high relay service adaptability.
Data Source
AI summary
There is provided a method at a second user equipment (UE2) comprising receiving, from a first UE (UE1), a relay request message indicating a relay request of UE1. The relay request is for a relay service requested by UE1. The relay request message comprises an indication of a Public Land Mobile Network (PLMN) to which UE1 is subscribed. The method comprises determining that the relay request can be accepted by UE2 in at least one case where: the UE2 is authorized to support the relay service; the relay service is allowed by a current cell of UE2 served by a network node; UE2 is currently in a Radio Resource Control connected state; UE1 subscribes to a same PLMN as UE2; or the network node has provided relevant Access Stratum configurations to UE2. The method comprises transmitting a relay response message to UE1 based on a result of the determination.